Calling device for telephone-exchanges.



Ne. 822,965. PATENTBD JUNE 12', 1906. P. A. LUNDQUIST. V UALLING DEVICEFOR TELEPHONE EXCHANGES.

APPLIUATION FILED JULY 11, 2904.

3 SHEETS-SHEET 1 PATENTED JUNE 12 1906;

P. A. LUNDQUIST. CALLING DEVICE FOR TELEPHONE EXCHANGES.

nruomxon rum) mun, 1904. I

a sums-SHEET 2.

Zw-fg@j PATVENTBD HIRE 12, 1906.

v P. A. LUNDQUIST. GALLING DEVICE FOR TELEPHONE EXCHANGES.

QPPLI'QATIDH FILED JULY 11, 190-1.

3 SHEETS-SHEET 3 Z -7 W146 QMMGCW able between two pins and 5.1 thespring B FRANK A. LUNDQUlST,

OF.CBIGAUO,1LLINOIS.

CALLING DEVICE FOR TELEFHONE EXOHANGES.

v No. 822,965.

Specification of Letters Patent.

ratenteo June 12, 1906.'

Application on July 11, 1904. Serial No. 215.931.

To all whom it may concern:

Be it known that I, FRANKA. Lunncmsr, a citizen of the United States ofAmerica, and a resident of Chicago, county of (look, and State ofIllinois, have invented certain new and useful Improvements in (FallingDevices for 'lelephone-Exchnnges of which the following is a.specification.

My invention relates to calling devices for telephone-exchanges, and hasfor its object improvement in the construction and operation of suchdevices.

The device shown in the present application is particularly adopted forlorge automatic exchanges where the numbers given to the stationsinclude threcpfour, or more figures, and it has provisions by which thenumber called is automatically registered.

In the accompanying drawings, Figure 1 a. front elevation showiw thepositionwhen h o u a a station has been called. Fig. 2 is a similar ntplate and surroundelevation with the fro Fig. 3 is s. section on hue ingcase removed. 3 3 of Fig. 1. Fig. 4 is c section on line 4 4 of Fig. 3.Fig. 5 is an enlarged detail of the opcrating mechanism. Fig. 6 isedetail of one of the re lettering-dials. Fig. 7 is an enlarged detail,0 the receiver-hook and parts operated thereby, and Fig. 8 is a detailof one of the contact-springs shown in Fig. 4.

Onthe front cover of on ordinary box A is a plate A, to which isattached a. cylindrical casing A Secured to the cover of the box A andextending through the center of the casing A is a spindle B. Secured tothe innot end of the spindle B is a. segment of a toothed wheel .13 anda spring B, which sets to retain the devices in the position shown.

()n the front end of the spindle B is secured a. plate (1, and on thisplate is a lever mov- (See Figs. e extreme a lever I), provided adaptedto sweep over the numbered dial 1.) on the cover D when said lever ismoved by hen(l.'- The lever D rests adjacent to the outer andupwardly-projecting end of the lever (1, and when the lover I) is movedbv hand to the right it swings the lever C on its pivotfrom contact withpin (I A further movement to contact with pin C .of the lever I) thenmoves the plate 0 and the spindle 13, Such movement of the spindle Brotatesthe segment B against the action of and causes its teeth tostrike ips E and F on the insulated 2 and 5.) Loosely n'lounted on thend of the Spltldlfl B is with a. pointer D,

the inclined l springs E and F. Adjacent to these springs are otherinsulated springs E and F. Those ports are so arranged that uponmovingthe segment onl 1 one tooth strikes the li E"; but the nnm er ofteeth that strike the ip. F is determined by the length of the movement.The lips E and F are so inclined that when the se ment B is movedforwerdin the direction 0 the arrow of Fig. 4 the springs E and F aremoved away from the contact-springs J and F but upon a backward movementE makes electrical connection to E and F makes electrical connection toF The arrangement is also such that'upon a backward movement following aforward movement either one or a so made with F with E F and E representdifferent lines over which electrical impulses are sent by a. movementof the calling device, and the spacin of the teeth on the segment B isso relate to the numbers on the dial D that the number of contacts madewith F corres ends to the number to which the pointer .8 previouslymoved by hand.

, and then one contact is made had been rise of contacts are On thesegment B is a. awl B, which eni gages a. ratchet-wheel.

with a union on a. governor mechanism B". Vl hen the segment B" movesforward as a result of a manual operation of the lever D, the pawl Brides over wheel B but when these parts return to their normal positionas a result of the action of the spring wheel, and hence the governormechanism. By this means the speed at which contacts are made with F isregulated.

The spacing of the ratchet-wheel B corresponds to the s acing of theteeth on the segment B, and t 1e ratchet-wheel and pawl are made so thatfor each tooth passed the pawl will make a distinct click that can be'liifcrlsi by the operator who moves the han- The first clickcorresponds to 6 on the dial 1) the second click to the Figure l, and soon, or b shifting the""-0 to the other endpf the gums on the die. thenumher of clicks can'be made to correspo d to the number to which thepointer -D is inoved. By knowing the arrangement and counting the clicksa subscribe can operate his calling device in the dark. i

, On one orto! the pletc (lis ais crewll the'teeth of the ratchet- B thepawl drives the ratcheti roe Figs. 2 and 5, and arranged to slide onthis screw and the spindle B is a slotted plate or slide C havingratchet-teeth on its op )osite edges. A spring C normally holds saidslide to the right. A

On the lever C is a pawl C rovided with a tail engaging the screw-hea C.A spring. C normally holds the lever C and pawl C in the position shownin the drawings and with said pawl disengaged from the -adjacentratchet-teeth on the slide O When the lcver C is moved on its ivotasaresult of manipulating the lever the pawl C engages the teeth on theslide C and. moves said slide one step to the left. This step iscompleted during the time the lever C is moving from in C? to pin G afurther movement of the ever C resulting. in a movement of the plate 0and all the parts carried thereby. When the hand-lever D is released,the spring B returns the plate C to its normal position, and the springC moves the pawl C to the right preparatory to again engaging and movingthe slide 0*. In the meantime the holding-pawl engages the teeth on theoposite side of the slide C and prevents it rom returning to the rightuntil said pawl has been released.

Loosely mounted on the spindle B are a series of disks G, part of eachof which is cut away, leaving on one side a rim G, having thereon aseries of figures. ()n the solid part of each disk is a series of pins Gspaced "to correspond to the s acing of the numbers on the rim G. As tieresult of part of the metal of a disk being cut away these disks areunbalanced and naturally tend to come to a rest with the heavy sidedown. Secured to any convenient stationary part, as the plate A, is apin G, Fig. 6, so located as to stop the gravity movement of the disksat a certain point and maintain their numbers at a definite relationshipto each other; These disks are of graduated sizes and arranged so thatwhen viewed in front the numbers on the rear disks are seen beyond theedges oft forward disks. The radial distance bet can a row of pins G onone disk and a similar row on the next adjacent disk is equal to thespacing of the ratchet-teeth on the slide C Alsoloosely' mounted on thespindle B and separating the disks G from each other 'are a series ofwashers G, provided with pro- 4 of the washers jections G that engage ap'in G. This pin prevents the washers from turning on the spindle, whileit permits them to slide to a limited extent.

A receiver hook H is pivoted at I to the late A and has a portion H,whic lies be- 'nd and slightl removed from the rear one Secured at aconvenient lace on the plate A is a spring J, that pro- 160th betweenthe part H and the rear washer These arts are so related to each otherthat when t e hook H is at its elevated posisecured thereto, to normalposition.

tion the part H forces the spring J against the rear washer G, and whenthe hook is at its lower position the n'ing Falls away from the washer.The resuit of this is that when. the hookill is elevated the disks (lare clamped between the washers G, so that when the disks are moved theyare held in the moved position by friction with the washers. \Vhen thehook depressed, this Friction is released and any moved disks (i arefree to fall by gravity back to their normal positions.

Secured to the slide C is a spring-pawl K, which when the slide is inits normal posi tion pro'eets back adjacent to and just outside of therow of pins G on the largest disk G. When the handle I) is moved byhand, the preliminary movement from its normal position to a positionabout halfway to (J oi the dial moves the lever against the pin C andconsequently moves the slide one step to the left, bringing the pawl Kin line with the outer row of pins G" on the largest disk G. The rest ofthe movement of the hand-lever D to 0 turns the plate (I on the spindleB far enough for the pawl K to ride over and drop behind the first pin Gon the largest diskG. A further movement of the hand-lever D moves thepawl K over successive pins G, said pins being so spaced that there isone pin i'oreach figure on the dial D When the hand-lever D is released,the spring B returns the spindle B and the parts In thus returning, thepawl K engages the pin G which it last passed over and moves the disk Ga corresponding distance. As the hook H is supposed to be in itselevated position when this last 0 eration is performed, the moved diskis he d in its moved position by the washers G in contact with itsopposite faces.

The preliminary part of the next forward movement of the hand-lever, Din a similar manner advances the pawl K to the row of pins on the nextdisk, and a further movement of the lever moves the pawl over the pinsin the same manner it would over a ratchet-wheel. When the lever isagain released, the seeond disk is moved a distance corres )onding tothe movement made by hand-iever I). In the same way the third and fourthdisks are moved a distance corresponding to movements made by thehandlever I).

In the cover D is an opening D, through which the rims G of thedisks Gmay be seen. The figures on the rims of the disks are so arranged thatwhen the lover I) has been moved with its pointer D to any figure on thedial D" the result will be that the same figure will ap ear at theopening D on the particular dis which happens to have been moved. ThusFig. 1 shows at the opening D the number 3,468 and indicates that thehand-lever D was successively moved to the figures ICC.

3, 4, 6," and 8 on the dial D These movements of the disks G may he madeeither on the forward or the backward movements of the lever I). Theyare shown as being made by the same movement that makes the electricalcontacts, and these are prefer ably made by the backward movements,because those movements are spring-0 erated and governed for speed,while forwari move-- ments by hand are very variable.

Pivoted on the plate A is a bracket M,

' which is normally held against a pin M by a s rin M. In said brac etis a rod M provlde with a beveled collar M and normaili, held to theleft by a spring M On the hon r H is a rejection H, adapted to engagethe collar iii when the hook is moved. When the hook is moving upward,the projection H causes the bracket M to turn on its pivot, so that thesaid projection. may )flSS to the oposite side of the collar M. hen thehook is movin downward, the pro'eetion engages the rear ace of thecollar an forces the rod M against a spring N and closes said spring toanother s ring M. At its lowest )osition the end of the projection Hslips 0 of the collar M and permits the rod M to return to its normalposition.

On the hook H is a pin H, ada ted to englage a cam-surface C on the hoding-pawl This engagement occurs on the down- Ward movement of the hookand causes a rele'eseoitheslide C, so that the spring C may return it tonormal position.

R-eviewing'the construction and operation, itwill be assumed that asubscriber at the calling device illustrated wishes'to call thesubscriber at station No; 3,468. He removes his receiver and permits hishook H to rise in the ordinary manner. He then moves the pointer'Dsuccessively to the figures 3, 4,

' 6," and 8, releasing the handleeach time to permit it to return to itsnormal position. 36 ore turning in his signal he examines his to istertpsee that he has madeno mistake. When through talkin he hangs up hisceiver, whereupon his 00k descends, and the registering-dials Gimmediately return to their normal position. These are all of the oerations of which the subscriber is directly conscious. The otheroperations are all automatic. Of these automatic operations the firstreturn movement of the handle 1) causes the figure 3 to appear at the oening D, and during the return movement t is teeth of the segment Bcause F to make three elec" trieal contacts with F, followin thisimmediately by one contact between and F).

The second return causes 4 to ppear at Dfland during the return fourcontacts are made between F and F and one between E and E. On the third.return six contacts are made at F and one at E, and the figure 6 spacersat the opening.

:1 the fourt return eight contacts are made at F and one at E", and thefigure 8 appears at the opening. Upon descent of the hook ll thelriotnnuil holding of the disks G is released, so that they may returnto normal position, and one contact is made between and N What .1 claimis 1. In a rolling device, o. contact-maker, means by which it may beunwed a plurality of times to make a plurality oi series of elec tricalcontort-s, an indicator associated withsaid device, and means by whichupon mal ing such plurality of series of contacts with saidconturtm'iaker said indicator will automatically register the nlnnlwr ofcomm-ts made in each series.

2. In combination, a contant-maker arranged in be moved. to make itseries of contacts, an indicator for determining the number of mutantsto be made lhorebv, and a register for recording the numlmr of contactsmade by said COIIiBCt-l]ifl-lfll' m van-h series of a plurality ofmovements.

3. in a selling device, the combination with a renter:t-olosing(lflvlli', and means for operating it so as to make a plurality of sories of electrical contacts, of a registering device associated withsaid nontiwtmlosing device and so arranged that ii will alumnae icallyregister the number oi contacts in each series oi'contacts mode bysaidclosingdcvicc.

4. In a calling device, the combination with a mutant-closing device, ahand-lever by which it may be moved, and an indicator for determiningthe amount of movement required for any given number of contacts, of aregister associated with said contact-closing device and arranged toautomatically register the number of contnul s made.

5. The ron'ibii'nition with a contact-closing device arranged to beoperated successively and to make a series of contacts upon eachoperation, of a registering device associated with saidcm'itsuzt-closing device and arranged to ontonuitieally register thenumber of contacts made upon each operation.

A numbered dial, a pointer adapted to he moved by hand any desireddistance over said dial, a contact-Innlifil' arranged to autoinatioaliylooks as many electrical contacts.

as iriilirutnd by n niovonn-nl of said pointer on said dial, and aregistering device arrang ad to nutomatimilly register, the number ofconblH'iH so mode.

7'. A contact-innlier, means for operating it so to make any desirednumber of contacts tluuvwilh, an indicator by means of which the desirednumber of contacts may be determined, and an nutomatioall -operatingregister for registering the man or of contacts made.

8. A lever adapted to be moved by hand from its normal position, an.indicator by which any desired length of movement may be determined, aspring for returning said levcr to its normal position, a contact-makeroperated by such return. movement so as to make as many contacts asindicated on said indicator by the movement of said lever, andautomaticall -operating means for registeriiig the num )cr of contactsso made.

9. In combination, a contact-maker adapted to be operated a number oftimes in suc ccssion, an indicator for determining the number ofcontacts made u on each opera tion, and a register for rccor ing thenumber of contacts made by each operation of a series of successiveoperations.

10. In combination, a numbered indicator, two contact-inakin devices,means by which upon operating sai indicator one of said contactsmakingdevices will make a series of contacts which series will beautomatically followed by one contact contact-making device, and aregister for rc cording the number of contacts made by the firstcontact-making device.

11. A calling device arranged to make a series of electrical contacts, aregister for recording the number of contacts so made, and areceiver-hook arranged to cause said register to return to its normalposition.

12. A contact-maker arranged to make successive series of contacts, aseries of wheels or disks provided with numbers, and means by which uponeach. successive operation of said contact-maker a diflerent wheel willbe moved so as to register the number of contacts made by saidcontact-maker during a corresponding operation.

13. A contact-maker arranged to be operated successive times and to makea series of contacts u)on each operation, a series of wheels or isksprovided with numbers and means by which upon each successive operationa different wheel will be moved so as to display the number whichindicates the numher-of contacts made by said contact-maker during acorresponding operation.

14. A contact-maker arranged to be oper ated successive times and tomake a series of contacts upon each operation a series of wheels each ofwhich is adapted to display a number indicating the number of contactsmade by said contact-maker, and a shifting connection between saidcontact-maker and said wheels whereby successive operations of thecontact-maker o crate successive wheels.

15. A contact-ma or arranged to be operated successive times and to makea series of contacts upon each operation, a series of wheels providedwith numbers, means b which upon each successive operation a di ferentwheel will be moved so as to display the number which indicates thenumber of contacts made by said contact-maker during wheels arranged torecord the num made by the second a corresponding operation, andautomatically-operating means for causing the moved wheels to return totheir normal positions.

16. A contact-maker and means for operatin it, an indicator fordetermining the num )SI of contacts to be made by each operation and aseries of independentl movable r of contacts made by successiveoperations.

17. A series of registering-wheels, a neceiver-hook, means by which anelevation of said hook will cause frictional resistance to be placedupon said wheels and a depression of said book will release suchfriction, means by which individual wheels may be moved (lesireddistances from their normal positions vhen said hook is elevated, andmeans by which said wheels will be automatically returned to theirnormal positions when said hook is depressed.

18. A series of wheels, a lever movable about a pivot and provided withconnections to one of said wheels,-and means by'which upon making aseries of movements with said leversaid connection will be automaticallyshifted from wheel to wheel.

19. A contact-maker wheel and means by which it may be moved by hand anyrequired distance from its normal position, a spring for returning it toits normal position when moved, means by which the return movement willmake a series of electrical contacts at one point and one extra contactat another point, and a governor for regulating the speed of the returnmovement.

20. A contact-making wheel and means for moving it by hand any requireddistance, an indicator by which the required distance is determined, a sring for returning the wheel to normal position when moved, means bywhich the return movement will make a series of electrical contacts atone point and one extra contact at another point, a governor forregulating the speed at which said contacts are made, and means forrecordin the number of contacts made in each series 0 contacts.

21. The combination with a movable receivcr-hook, a pivoted slide, and acontaetclosing device, of means by which a rising movement of said bookwill cause said slide to turn on its pivot, and means by which adescending movement of said hook will cause said slide to move in itsguide and operate said contact-closing device.

Signed at lhicago, Illinois, this 9th day of July, 1904.

FRANK A. LUNDQUIST. Witnesses:

WM. A. ROWLAND, CASPER L. REDFIELD.

